[Fix](Nereids)add nereids load function in read fields of GlobalFunctionMgr and Database

fe/fe-core/src/main/java/org/apache/doris/catalog/Database.java

@@ -635,7 +635,7 @@ public void readFields(DataInput in) throws IOException {
         dbState = DbState.valueOf(Text.readString(in));
         attachDbName = Text.readString(in);
 
-        FunctionUtil.readFields(in, name2Function);
+        FunctionUtil.readFields(in, this.getFullName(), name2Function);
 
         // read encryptKeys
         if (Env.getCurrentEnvJournalVersion() >= FeMetaVersion.VERSION_102) {

fe/fe-core/src/main/java/org/apache/doris/catalog/FunctionRegistry.java

@@ -157,7 +157,6 @@ public String getCandidateHint(String name, List<FunctionBuilder> candidateBuild
                 .collect(Collectors.joining(", ", "[", "]"));
     }
 
-
     public void addUdf(String dbName, String name, UdfBuilder builder) {
         if (dbName == null) {
             dbName = GLOBAL_FUNCTION;

fe/fe-core/src/main/java/org/apache/doris/catalog/FunctionUtil.java

@@ -181,7 +181,8 @@ public static void write(DataOutput out, ConcurrentMap<String, ImmutableList<Fun
         }
     }
 
-    public static void readFields(DataInput in, ConcurrentMap<String, ImmutableList<Function>> name2Function)
+    public static void readFields(DataInput in, String dbName,
+            ConcurrentMap<String, ImmutableList<Function>> name2Function)
             throws IOException {
         int numEntries = in.readInt();
         for (int i = 0; i < numEntries; ++i) {
@@ -191,7 +192,11 @@ public static void readFields(DataInput in, ConcurrentMap<String, ImmutableList<
             for (int j = 0; j < numFunctions; ++j) {
                 builder.add(Function.read(in));
             }
-            name2Function.put(name, builder.build());
+            ImmutableList<Function> functions = builder.build();
+            name2Function.put(name, functions);
+            for (Function f : functions) {
+                translateToNereids(dbName, f);
+            }
         }
     }
 
@@ -234,7 +239,8 @@ public static boolean translateToNereids(String dbName, Function function) {
                 JavaUdaf.translateToNereidsFunction(dbName, ((AggregateFunction) function));
             }
         } catch (Exception e) {
-            LOG.warn("Nereids create function {}:{} failed", dbName, function.getFunctionName().getFunction(), e);
+            LOG.warn("Nereids create function {}:{} failed, caused by: {}", dbName == null ? "_global_" : dbName,
+                    function.getFunctionName().getFunction(), e);
         }
         return true;
     }
@@ -246,7 +252,8 @@ public static boolean dropFromNereids(String dbName, FunctionSearchDesc function
                     .collect(Collectors.toList());
             Env.getCurrentEnv().getFunctionRegistry().dropUdf(dbName, fnName, argTypes);
         } catch (Exception e) {
-            LOG.warn("Nereids drop function {}:{} failed", dbName, function.getName(), e);
+            LOG.warn("Nereids drop function {}:{} failed, caused by: {}", dbName == null ? "_global_" : dbName,
+                    function.getName(), e);
         }
         return false;
     }

fe/fe-core/src/main/java/org/apache/doris/catalog/GlobalFunctionMgr.java

@@ -57,7 +57,7 @@ public void write(DataOutput out) throws IOException {
     @Override
     public void readFields(DataInput in) throws IOException {
         super.readFields(in);
-        FunctionUtil.readFields(in, name2Function);
+        FunctionUtil.readFields(in, null, name2Function);
     }
 
     public synchronized void addFunction(Function function, boolean ifNotExists) throws UserException {

fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/UdfTest.java

@@ -40,9 +40,15 @@
 import org.apache.doris.nereids.util.PlanPatternMatchSupported;
 import org.apache.doris.utframe.TestWithFeService;
 
+import avro.shaded.com.google.common.collect.ImmutableList;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+
 public class UdfTest extends TestWithFeService implements PlanPatternMatchSupported {
     @Override
     protected void runBeforeAll() throws Exception {
@@ -171,4 +177,20 @@ public void testParameterUseMoreThanOneTime() throws Exception {
                                         && relation.getProjects().get(0).child(0).equals(expected))
                 );
     }
+
+    @Test
+    public void testReadFromStream() throws Exception {
+        createFunction("create global alias function f8(int) with parameter(n) as hours_add(now(3), n)");
+        Env.getCurrentEnv().getFunctionRegistry().dropUdf(null, "f8",
+                ImmutableList.of(IntegerType.INSTANCE));
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        Env.getCurrentEnv().getGlobalFunctionMgr().write(new DataOutputStream(outputStream));
+        byte[] buffer = outputStream.toByteArray();
+        ByteArrayInputStream inputStream = new ByteArrayInputStream(buffer);
+        Env.getCurrentEnv().getGlobalFunctionMgr().readFields(new DataInputStream(inputStream));
+
+        Assertions.assertEquals(1, Env.getCurrentEnv().getFunctionRegistry()
+                .findUdfBuilder(connectContext.getDatabase(), "f8").size());
+    }
 }